For an early stage company (certainly), and likely for any enterprise, the only interview question for candidates should be, "Tell me a story about how you've made something GREAT happen, and why you believe you can make that happen here."

Life is short. Fiscal years are short. Investor patience is short. Incremental results are… incremental. If you want to make something special happen, hire toward nothing less. Demand nothing less. Most importantly: set a standard, by your actions, toward nothing less.